java的remove方法

扫描仪类remove()方法 (Scanner Class remove() method)

• remove() method is available in java.util package.

  remove()方法在java.util包中可用。

• remove() method is used to result an exception during the call remove() method.

  remove()方法用于在调用remove()方法期间导致异常。

• remove() method is a non-static method, it is accessible with the class object only and if we try to access the method with the class name then we will get an error.

  remove()方法是一种非静态方法，只能通过类对象访问，如果尝试使用类名称访问该方法，则会收到错误消息。

• remove() method may throw an exception at the time of throwing an exception.

  remove()方法可能会在引发异常时引发异常。

  UnsupportedOperationException: This exception may throw when this method is unsupported.

  UnsupportedOperationException ： 不支持此方法时，可能会引发此异常。

Syntax:

句法：

public void remove();

Parameter(s):

参数：

• It does not accept any parameter.

  它不接受任何参数。

Return value:

返回值：

The return type of the method is void, it returns nothing.

该方法的返回类型为void ，不返回任何内容。

Example:

例：

// Java program to demonstrate the example // of void remove() method of Scanner import java.util.*;public class RemoveOfScanner {
       public static void main(String[] args) {
           String str = "Hi, true \n IncludeHelp! 8 + 2.0f = 10.0f";        // Instantiate Scanner with the         //given str        Scanner sc = new Scanner(str);        //Display Scanner        System.out.println("sc.nextLine(): " + sc.nextLine());        // By using remove() method will        // result an exception        sc.remove();        // close the scanner        sc.close();    }}

Output

输出量

sc.nextLine(): Hi, true Exception in thread "main" java.lang.UnsupportedOperationException	at java.base/java.util.Scanner.remove(Scanner.java:1490)	at RemoveOfScanner.main(RemoveOfScanner.java:19)

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java的remove方法